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How do you read a RefSeq?
RefSeq records are distinguished from INSDC records by: Accession format: The most distinguishing feature of a RefSeq record is the distinct accession number format that begins with two characters followed by an underscore (e.g., NP_). INSDC accession numbers never include an underscore.
How do you blast a protein sequence?
Select the ‘Blast’ tab of the toolbar at the top of the page to run a sequence similarity search with the Blast program. Enter either a protein or nucleotide sequence or a UniProt identifier into the form field (Figure 37). Click the ‘Run Blast’ button.
What is non-redundant protein?
– UniProtKB/TrEMBL is ‘non-redundant’ in the sense that all identical, full-length protein sequences, provided they come from the same species, are represented in a single record. Fragments, isoforms, variants and so on, encoded by the same gene, are stored in separate entries.
How big is RefSeq?
RefSeq is limited to major organisms for which sufficient data are available (more than 66,000 distinct “named” organisms as of September 2011), while GenBank includes sequences for any organism submitted (approximately 250,000 different named organisms)….RefSeq.
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How do you read protein Blast results?
The results are defined as:
- Maximum Score is the highest alignment score (bit-score) between the query sequence and the database segments.
- Total Score is the sum of the alignment scores of all sequences from the same db.
- Percent Query Coverage is the percent of the query length that is included in the aligned segments.
How do I read my blast results?
The list of hits starts with the best match (most similar). E-value: expected number of chance alignments; the smaller the E-value, the better the match. First in the list is the query sequence itself, which obviously has the best score.
What is the meaning of non-redundant?
: not characterized by repetition or redundancy : not redundant nonredundant functions nonredundant rules.
What is sequence redundancy?
In bioinformatics, redundancy in a collection of sequences occurs when one or more similar/homologous sequences are present in the same set of data. The inclusion of similar sequences in certain analyses will introduce undesirable biases.
When to adjust search parameters in protein BLAST?
The “Search for short, nearly exact matches” nucleotide and protein pages no longer exist. Instead, the nucleotide and protein blast programs automatically check for short queries and adjust the search parameters accordingly. This adjustment occurs when the query, either nucleotide or amino acid, is of length 30 or less.
Where can I find RefSeq non redundant protein Records?
Genomic records: Navigate to the nucleotide database to access, in Summary format, the set of RefSeq genomic sequences that include a CDS feature annotation which encodes the identical non-redundant protein record. Following the “Genomic records” link from WP_003547430.1 to NCBI’s Nucleotide resource returns 47 genomic records (as of March 2015).
How to use BLASTp to search protein database?
BlastP simply compares a protein query to a protein database. PSI-BLAST allows the user to build a PSSM (position-specific scoring matrix) using the results of the first BlastP run. PHI-BLAST performs the search but limits alignments to those that match a pattern in the query.
How many proteins have been annotated in RefSeq As of March 2015?
As of March 2015, WP_003547430. 1 has been annotated on 47 genomes from 16 different species (or ‘sp.’ organisms). This report can be accessed using the link provided at the top of the page in the Protein resource. The ‘Display Settings’ menu also provides access to this report.